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CARDINAL TEMPERATURES FOR GERMINATION OF THE MEDICINAL ANDDESERT PLANT, Calotropis procera Planta Daninha
TAGHVAEI,M.; SADEGHI,H.; KHAEF,N..
ABSTRACT Calotropis procera, Apocynaceae, is a wild perennial shrub that originated in the Persian deserts. It is known to provide key resources in degraded ecosystems to about 80 animal species. C. procera is regenerated by seed and produces lots of small seeds that are dispersed by wind; nonetheless, its density is very low. The purpose of this study is to estimate the cardinal temperatures including the base, optimum, and maximum temperatures of Calotropis procera looking at two different ecotypes in the Iranian desert. The germination behavior of C. procera seeds was tested at temperature regimens of 0, 5, 10, 15, 20, 25, 30, 35 and 40oC and was analyzed using linear regression models. The rate of germination increased between base and optimum thermal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Base temperature; Optimum temperature; Linear regressions.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000400671
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Cardinal temperatures for planting-emergence phase in gladiolus Ciência Rural
Muttoni,Martina; Alberto,Cleber Maus; Bartz,Alex Cristiano; Uhlman,Lilian Osmari; Tartaglia,Vanderley de Lima; Streck,Nereu Augusto.
ABSTRACT: The objective of this study was to determine the cardinal temperatures for the planting-emergence phase of gladiolus. A controlled environment experiment was performed in a growth chamber in the Universidade Federal do Pampa - Campus Itaqui, using the completely randomized experimental design with 12 temperature treatments (5°C, 7°C, 10°C, 13°C, 16°C, 18°C, 20°C, 22°C, 25°C, 30°C, 33°C, 35°C) and ten replicates. Corms of the cultivar ‘Amsterdam’ were planted at a depth of 10cm in 1.7dm3 pots. Every day the date of emergence of the gladiolus plants was observed. Then for each treatment, the emergence rate was calculated as the inverse of the duration of the budding phase, and estimated data were achieved employing the non-linear model of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gladiolus x grandiflorus Hort.; Lower base temperature; Upper base temperature; Optimum temperature; Development.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001000201
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Prediction of xylanase optimal temperature by support vector regression Electron. J. Biotechnol.
Zhang,Guangya; Ge,Huihua.
Background: Support vector machine (SVM), a novel powerful machine learning technology, was used to develop the non-linear quantitative structure-property relationship (QSPR) model of the G/11 xylanase based on the amino acid composition. The uniform design (UD) method was applied to optimize the running parameters of SVM for the first time. Results: Results showed that the predicted optimum temperature of leave-one-out (LOO) cross-validation fitted the experimental optimum temperature very well, when the running parameter C, ξ, and γ was 50, 0.001 and 1.5, respectively. The average root-mean-square errors (RMSE) of the LOO cross-validation were 9.53ºC, while the RMSE of the back propagation neural network (BPNN), was 11.55ºC. The...
Tipo: Journal article Palavras-chave: Amino acid composition; Optimum temperature; Support vector machine; Uniform design; Xylanase.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000100007
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Thermal preference and tolerance of Peruvian grunt Anisotremus scapularis juveniles (Pisces: Haemulidae) ArchiMer
Leon-palomino, Candy; Flores-mego, Jorge; Dionicio-acedo, Jhon; Rosado-salazar, Maryandrea; Flye-sainte-marie, Jonathan; Aguirre-velarde, Arturo.
Thermal preference and tolerance of juvenile Anisotremus scapularis (Pisces: Haemulidae) at different acclimation temperatures (14, 17 and 22°C) were evaluated in order to estimate the optimum temperature and the thermal tolerance limits of this species. The preference was determined through acute preferred temperature. Maximum critical temperature and mean lethal temperature allowed to estimate thermal tolerance. The results show that acclimation temperatures higher than 14°C increase both thermal preference and tolerance. However, individuals acclimatized to 22°C preferred temperatures lower than their acclimation. In addition, thermal tolerance was identical between individuals acclimatized at 17°C and 22°C. The optimum temperature of juvenile A....
Tipo: Text Palavras-chave: Anisotremus scapularis; Thermal preference; Thermal tolerance; Acclimation temperature; Optimum temperature.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00421/53294/54107.pdf
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